NOS NIB Vintage Heathkit 54-74 Plug-In Transformer Power w/ AC jack #1

Description

Up for sale here is this NOS NIB vintage transformer.  This is marked 54-74 549928.  The "54-74" is a Heathkit ID number, and the "549928" means it was made by Midwest Coil & Transformer the 28th week of 1959.  This has an AC jack built into one side and has a bunch of wires coming out the other side.  It came with a piece of paper that had "Transform Heath 12vDC to 117VAC AC BOE" written on it.  I have no idea exactly what this does, but if you know anything about it, please let me know.  This is new in the original box and is guaranteed to work for you.  It does have some light wear and light rust from storage/handling.  Here's your chance to get a pretty rare vintage transformer.  Please see my pictures for details.
US shipping and handling is , and international is .  I accept Paypal.  If you have any questions, please ask.
I have a number of other transformers, collectibles, and vintage electronics listed--feel free to take a look!